Mount Barnes is a 5,987-foot (1,825-metre) mountain summit located within Olympic National Park in Jefferson County of Washington state. Mount Barnes is part of the Bailey Range, which is a subrange of the Olympic Mountains, and is set within the Daniel J. Evans Wilderness. Neighbors include Mount Queets, 1.7 mi (2.7 km) to the southwest, and Mount Olympus is set 6.2 mi (10.0 km) to the west. Precipitation runoff from the mountain drains west into the Queets River, south into headwaters of the Elwha River, and northeast into Goldie River which is a tributary of the Elwha. Topographic relief is significant as the summit rises 3,200 feet (975 m) above Elwha Basin in approximately two miles.